385216939 has 2 divisors, whose sum is σ = 385216940. Its totient is φ = 385216938.

The previous prime is 385216933. The next prime is 385217023. The reversal of 385216939 is 939612583.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 385216939 - 2⁵ = 385216907 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (385216933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192608469 + 192608470.

It is an arithmetic number, because the mean of its divisors is an integer number (192608470).

Almost surely, 2^385216939 is an apocalyptic number.

385216939 is a deficient number, since it is larger than the sum of its proper divisors (1).

385216939 is an equidigital number, since it uses as much as digits as its factorization.

385216939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 349920, while the sum is 46.

The square root of 385216939 is about 19626.9442094280. The cubic root of 385216939 is about 727.6152486059.

The spelling of 385216939 in words is "three hundred eighty-five million, two hundred sixteen thousand, nine hundred thirty-nine".